191994 has 16 divisors (see below), whose sum is σ = 419040. Its totient is φ = 58160.

The previous prime is 191977. The next prime is 191999. The reversal of 191994 is 499191.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (191999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389 + ... + 1520.

It is an arithmetic number, because the mean of its divisors is an integer number (26190).

2¹⁹¹⁹⁹⁴ is an apocalyptic number.

191994 is an abundant number, since it is smaller than the sum of its proper divisors (227046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191994 is a wasteful number, since it uses less digits than its factorization.

191994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925.

The product of its digits is 2916, while the sum is 33.

The square root of 191994 is about 438.1711994187. The cubic root of 191994 is about 57.6893818687.

The spelling of 191994 in words is "one hundred ninety-one thousand, nine hundred ninety-four".